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Wheel Tread

Top Lock

Brake

Pedal Break

Rectangular

Top plate

Square Top

plate

Threaded

Stem

Square

Grip Ring

Stem

Round

Stem Grip Ring

Stem Octagon

Stem

Rubber

Expanding

Stem

Pipe

Stem

Axle with

Zerk Fitting

Bearing

Race

Wheel

Hub

Dust

Cover

Rig

Basic Caster Parts

Main Load

Bearing

Leg

Horn Base

Horn

Zerk Fitting for

Lubrication

Axle Mounting

Holes

Standard Axle

Bolt

Axle Nut

Spanner Bushing

Caster Terminology Mounting

Top Plate

Bolt Holes Bolt Holes

B

A

D

C

B – TREAD WIDTH

Wheel width measured at the tread.

A – SWIVEL RADIUS

Distance measured horizontally from the

center of the kingpin to the trailing edge of

the wheel.

C– WHEEL DIAMETER

Distance measured across the

diameter of the wheel.

D – OVERALL HEIGHT

Vertical distance measured from

the floor to the top of the

mounting plate.

Offset Kingpin

Caster Measurements

Cushion or

Hard Rubber

Conductive

Rubber

Cushion or

Hard Rubber

W/Side Plates

Advantage™

TPR Round

and Flat

Advantage™ Heat

Round and Flat Red

Advantage™ Health

Antimicrobial Flat

Tread

Welded Disc Blue Poly,

Black or Grey Rubber

Polyolefin Phenolic Polyloc™ Grey

and Blue

High Temp

Resin

Moldon

Rubber/

Aluminum

Core

Moldon

Rubber/ Cast

Iron Core

Advantage™

TPR Flat

Advantage™

TPR Round

Advantage™

TPR HD Flat

High Modulus

Rubber Donut

Polyloc™ Grey Polyloc™ Blue

Moldon

polyurethane/

Aluminum

Core

Moldon

Polyurethane/

Cast Iron Core

Phenolic Polyolefin

Triton

Enhanced

Polypropylene

Solid

Elastomer V-Groove Cast Iron

Basic Wheel Types

Note: Please See “Caster Wheels”

Section for Complete Descriptions and

Details on Available Wheels.

Top Lock Brake Assembly

Caster Part Overview

Wheel Axle

Ball Bearings Roller Bearings Precision Ball Bearings

Pedal Lock Brake

Spanner Bushings Delrin Bearings Corner Bumpers

Caster Dock Floor Truck Locks Caster Swivel Lock

Basic Fastening Types

Typical Caster Plates

Caster Rigs

Kingpinless Swivel Top Plate Swivel Top Plate Swivel W/Brake

Threaded Stem Swivel Threaded Stem Swivel W/Brake Pipe Stem Swivel

Rubber Expanding Adaptor Grip Ring Stem Round Stem

Square Stem Single Piece Rigid Welded Rigid

Metal Ball Hooded Metal Ball Medical

Twin Wheel Stem Twin Wheel W/Lock Pneumatic Swivel

Furniture and Medical Casters

Side Lock Brake Total Lock Brake Top lock brake

Caster Brakes

Truck Floor Lock Swivel Lock Adjustable Stabilizer